# Tempo Halowerk – Dokument Renderstart-Zeit Prüfung

> Tempo Halowerk – Dokument Renderstart-Zeit Prüfung is a paid API for AI agents from tempo.halowerk.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).

Checks and measures the time-to-first-visible-render (Renderstart) for a document object at a given public URL.

## Facts

- Endpoint: POST https://tempo.halowerk.com/v1/pruef/tempo/renderstart/dokument
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/tempo-halowerk-dokument-renderstart-zeit-pr-fung-d7872175
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_SeIAx-l7DAQI9wwxLS0_V

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability tempo-halowerk-dokument-renderstart-zeit-pr-fung-d7872175 -d '<json body>'
```

Example prompt: Can you check how long it takes for the document at https://example.com/report.pdf to start visually rendering? I want to know the time-to-first-visible-render.

## When to prefer this

Use this endpoint when you need to specifically measure the time-to-first-visible-render (Renderstart) for a document object (e.g. an HTML page, PDF, or published document). Prefer this over generic page-speed endpoints when your target is a document URL rather than a full webpage, video, image, or script, and you need a focused Renderstart metric rather than full-page load or TTFB metrics.

## Known failure modes

- URL is not publicly accessible or returns a non-200 status — probe fails with an unreachable error
- Document is behind authentication or a firewall — connection refused or timeout
- CSS selector provided matches no element — defaults to first match or returns no-selector error
- URL exceeds maxLength of 2048 characters — validation error
- Malformed URL or unsupported protocol — input validation failure
- Rendering engine timeout if document is extremely slow to respond

## How this service works

Prüft am Objekt dokument den Befund Zeit bis zum sichtbaren Renderstart.

## Output

Returns a performance measurement indicating the elapsed time (in milliseconds or seconds) from request initiation until the document's first visible render event, along with any relevant metadata about the probe result.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "ziel": {
   "oneOf": [
    {
     "type": "string",
     "maxLength": 2048,
     "minLength": 1,
     "description": "Öffentliche HTTP(S)-Adresse; bei DNS-Befunden Domain oder öffentliche IP."
    },
    {
     "type": "object",
     "required": [
      "adresse"
     ],
     "properties": {
      "adresse": {
       "type": "string",
       "maxLength": 2048,
       "minLength": 1
      },
      "selektor": {
       "type": "string",
       "maxLength": 240,
       "minLength": 1,
       "description": "CSS-Selektor: genau ein Objekt, sonst erster Treffer des Objektfilters."
      },
      "vergleich": {
       "type": "string",
       "maxLength": 2048,
       "description": "Öffentliche Vergleichsadresse für Link-, Sitemap- oder Sprachbefunde."
      },
      "user_agent": {
       "type": "string",
       "pattern": "^[A-Za-z0-9_-]{1,80}$"
      },
      "dkim_selektor": {
       "type": "string",
       "pattern": "^[A-Za-z0-9_-]{1,63}$"
      }
     },
     "additionalProperties": false
    }
   ]
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/tempo-halowerk-dokument-renderstart-zeit-pr-fung-d7872175/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from tempo.halowerk.com](https://www.zero.xyz/host/tempo.halowerk.com/llms.txt)